Home / 21,945.72-30,286.38-12,517.32

Finding the Fourth Proportional to 21,945.72, 30,286.38 and 12,517.32

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Solution

The fourth proportional to 21,945.72, 30,286.38 and 12,517.32 is: 17,274.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,945.72 : 30,286.38 = 12,517.32 : x
  2. Step 2: Convert to fraction form
    21,945.72/30,286.38 = 12,517.32/x
  3. Step 3: Cross multiply
    21,945.72x = 30,286.38 × 12,517.32
  4. Step 4: Simplify right side
    21,945.72x = 379,104,310.10
  5. Step 5: Solve for x
    x = 379,104,310.10/21,945.72
  6. Step 6: Final answer
    x = 17,274.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.